EP3437622B1 - Zement zur dentalen verwendung - Google Patents

Zement zur dentalen verwendung Download PDF

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Publication number
EP3437622B1
EP3437622B1 EP16897053.1A EP16897053A EP3437622B1 EP 3437622 B1 EP3437622 B1 EP 3437622B1 EP 16897053 A EP16897053 A EP 16897053A EP 3437622 B1 EP3437622 B1 EP 3437622B1
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European Patent Office
Prior art keywords
glass powder
acid
mass
content
range
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EP16897053.1A
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English (en)
French (fr)
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EP3437622A4 (de
EP3437622A1 (de
Inventor
Ryosuke YOSHIMITSU
Satomi TATEIWA
Shigenori AKIYAMA
Katsushi Yamamoto
Syouichi Fukushima
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GC Corp
Original Assignee
GC Corp
GC Dental Industiral Corp
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Publication of EP3437622A4 publication Critical patent/EP3437622A4/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • A61K6/889—Polycarboxylate cements; Glass ionomer cements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C4/00—Compositions for glass with special properties
    • C03C4/0007—Compositions for glass with special properties for biologically-compatible glass
    • C03C4/0021—Compositions for glass with special properties for biologically-compatible glass for dental use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/20—Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/28—Other inorganic materials
    • C03C2217/284—Halides
    • C03C2217/285—Fluorides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/28—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing organic polyacids, e.g. polycarboxylate cements, i.e. ionomeric systems

Definitions

  • the present invention relates to a dental cement.
  • an aluminosilicate glass powder As a dental glass powder, an aluminosilicate glass powder is well known.
  • the aluminosilicate glass powder is a glass powder containing oxides of Al (III) and Si (IV) as a main component.
  • a fluoroaluminosilicate glass powder is widely used for a dental material because it is expected to have a tooth strengthening effect by fluorine and an effect of preventing tooth decay (see, for example, Patent Documents 1 and 2) .
  • the fluoroaluminosilicate glass powder is known to be used for a dental glass ionomer cement.
  • Dental glass ionomer cement is generally composed of a fluoroaluminosilicate glass powder and a liquid containing a polycarboxylic acid-based polymer and water, and a hardened substance is obtained by an acid-base reaction of aluminum (ions) in the fluoroaluminosilicate glass powder with the polycarboxylic acid-based polymer included in the liquid.
  • Patent Document 1 Japanese Laid-open Patent Publication No. S62-67008
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. S63-201038
  • WO2005/074862 discloses a glass powder used in a dental cement containing 10 wt% of ZnO, 30 wt% of SiO 2 , 15 wt% of F and no Al 2 O 3 .
  • an object in one aspect of the present invention is to provide a dental cement that can enhance an effect of suppressing tooth demineralization.
  • a dental cement contains a glass powder, wherein the glass powder contains zinc, silicon, and fluorine and does not substantially contain aluminum, wherein a content of zinc in the glass powder in terms of zinc oxide (ZnO) is in a range of 20% to 55% by mass, wherein a content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is in a range of 20% to 40% by mass, wherein a content of fluorine (F) in the glass powder is in a range of 3% to 20% by mass, and wherein a content of aluminum in the glass powder in terms of aluminum oxide (Al 2 O 3 ) is less than or equal to 1% by mass.
  • ZnO zinc oxide
  • SiO 2 silicon oxide
  • F fluorine
  • Al 2 O 3 aluminum oxide
  • a dental cement contains a glass powder.
  • dental cement examples include, but are not limited to, a dental glass ionomer cement, and the like.
  • a glass powder according to the present embodiment contains zinc, silicon, and fluorine and does not substantially contain aluminum, wherein a content of zinc in the glass powder in terms of zinc oxide (ZnO) is in a range of 20% to 55% by mass, wherein a content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is in a range of 20% to 40% by mass, wherein a content of fluorine (F) in the glass powder is in a range of 3% to 20% by mass, and wherein a content of aluminum in the glass powder in terms of aluminum oxide (Al 2 O 3 ) is less than or equal to 1% by mass.
  • ZnO zinc oxide
  • SiO 2 silicon oxide
  • F fluorine
  • Al 2 O 3 aluminum oxide
  • not substantially containing aluminum means that the content of aluminum is less than or equal to 1% by mass in terms of aluminum oxide (Al 2 O 3 ).
  • the content of aluminum in the glass powder is preferably in a range of from 0% to 0.5% by mass, and is more preferably in a range of from 0% to 0.3% by mass, in terms of aluminum oxide (Al 2 O 3 ).
  • the content of zinc in the glass powder is in a range of from 20% to 55% by mass, in terms of zinc oxide (ZnO) .
  • ZnO zinc oxide
  • the content of zinc in the glass powder in terms of zinc oxide (ZnO) is greater than or equal to 20% by mass, the effect of suppressing tooth demineralization of the glass powder can be enhanced.
  • the content of zinc in the glass powder in terms of zinc oxide (ZnO) is less than or equal to 55% by mass, a glass powder having a high transparency is easily obtained.
  • the content of silicon in the glass powder is in a range of from 20% to 40% by mass, in terms of silicon oxide (SiO 2 ) .
  • silicon serves to form a network in glass.
  • the content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is greater than or equal to 20% by mass, a glass powder having a high transparency is easily obtained.
  • the content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is less than or equal to 40% by mass, a dental cement having an appropriate hardening property is easily obtained.
  • the content of fluorine (F) in the glass powder is in a range of from 3% to 20% by mass.
  • the content of fluorine (F) in the glass powder is greater than or equal to 3%, tooth can be expected to be reinforced.
  • the content of fluorine (F) in the glass powder is less than or equal to 20% by mass, a dental cement having an appropriate hardening property is easily obtained.
  • the glass powder may further contain calcium, phosphorus, strontium, lanthanum, sodium, potassium, or the like.
  • the content of calcium in the glass powder is preferably in a range of from 0% to 30% by mass, and is more preferably in a range of from 5% to 20% by mass, in terms of calcium oxide (CaO).
  • CaO calcium oxide
  • the content of phosphorus in the glass powder is preferably in a range of from 0% to 10% by mass, and is more preferably in a range of from 0% to 5% by mass, in terms of phosphorus oxide (V) (P 2 O 5 ).
  • V phosphorus oxide
  • the content of strontium in the glass powder is preferably in a range of from 0% to 40% by mass, and is more preferably in a range of from 10% to 30% by mass, in terms of strontium oxide (SrO).
  • strontium oxide SrO
  • the content of lanthanum in the glass powder is preferably in a range of from 0% to 50% by mass, and is more preferably in a range of from 10% to 40% by mass in terms of lanthanum oxide (La 2 O 3 ).
  • the glass powder contains lanthanum, the resistance to acids of a hardened substance of the dental cement is enhanced.
  • the content of sodium in the glass powder is preferably in a range of from 0% to 15% by mass, and is more preferably in a range of from 1% to 10% by mass, in terms of sodium oxide (Na 2 O).
  • Na 2 O sodium oxide
  • the content of potassium in the glass powder is preferably in a range of from 0% to 10% by mass, and is more preferably in a range of from 1% to 5% by mass, in terms of potassium oxide (K 2 O).
  • K 2 O potassium oxide
  • a glass powder according to the present embodiment can be produced by, after melting a material composition containing a zinc compound, a silicon compound, and a fluorine compound and not containing an aluminum compound, pulverizing the material composition.
  • Examples of the zinc compound include, but are not limited to, zinc oxide, zinc fluoride, and the like, and two or more kinds may be used in combination as the zinc compound.
  • Examples of the silicon compound include, but are not limited to, anhydrous silicic acid and the like, and two or more kinds may be used in combination as the silicon compound.
  • the material composition may further contain a compound such as a calcium compound, a phosphorus compound, a strontium compound, a lanthanum compound, a sodium compound, and a potassium compound.
  • a compound such as a calcium compound, a phosphorus compound, a strontium compound, a lanthanum compound, a sodium compound, and a potassium compound.
  • fluorine compound examples include, but are not limited to, calcium fluoride, strontium fluoride, sodium fluoride, and the like, and two or more kinds may be used in combination as the fluorine compound.
  • Examples of the calcium compound include, but are not limited to, calcium fluoride, calcium phosphate, calcium carbonate, calcium hydroxide and the like, and two or more kinds may be used in combination as the calcium compound.
  • Examples of the phosphorus compound include, but are not limited to, calcium phosphate, strontium phosphate, sodium dihydrogenphosphate, and the like, and two or more kinds may be used in combination as the phosphorus compound.
  • strontium compound examples include, but are not limited to, strontium fluoride, strontium hydroxide, strontium carbonate, strontium oxide, strontium phosphate, and the like, and two or more kinds may be used in combination as the strontium compound.
  • lanthanum compound examples include, but are not limited to, lanthanum fluoride, lanthanum oxide, and the like, and two or more kinds may be used in combination as the lanthanum compound.
  • Examples of the sodium compound include, but are not limited to, sodium dihydrogenphosphate, sodium carbonate, sodium fluoride, and the like, and two or more kinds may be used in combination as the sodium compound.
  • Examples of the potassium compound include, but are not limited to, potassium fluoride, potassium carbonate, potassium hydrogencarbonate, dipotassium hydrogen phosphate, and the like, and two or more kinds may be used in combination as the potassium compound.
  • each compound in the material composition may be mixed in accordance with a composition of the glass powder other than aluminum.
  • the number average particle diameter of the glass powder according to the present embodiment is preferably in a range of from 0.02 ⁇ m to 30 ⁇ m, and is more preferably in a range of from 0.02 ⁇ m to 20 ⁇ m.
  • the number average particle diameter of the glass powder is greater than or equal to 0.02 ⁇ m, the operability of the dental cement is improved.
  • the number average particle diameter of the glass powder is less than or equal to 30 ⁇ m, the wear resistance of a hardened substance of the dental cement is enhanced.
  • a dental glass ionomer cement according to the present embodiment includes a glass powder according to the present embodiment.
  • the glass powder according to the present embodiment is hardened.
  • the dental glass ionomer cement according to the present embodiment is preferably composed of a first component containing a glass powder according to the present embodiment and a second component containing a polycarboxylic acid-based polymer and water.
  • a polycarboxylic acid-based polymer powder may be added as needed to the first component in order to enhance the strength of a hardened product of the dental glass ionomer cement.
  • polycarboxylic acid-based polymer included in the first component examples include, but are not limited to, a homopolymer or copolymer of an ⁇ , ⁇ -unsaturated carboxylic acid.
  • Examples of the ⁇ , ⁇ -unsaturated carboxylic acid include acrylic acid, methacrylic acid, 2-chloroacrylic acid, 3-chloroacrylic acid, aconitic acid, mesaconic acid, maleic acid, itaconic acid, fumaric acid, glutaconic acid, citraconic acid, and the like.
  • the polycarboxylic acid-based polymer may be a copolymer of an ⁇ , ⁇ -unsaturated carboxylic acid and a component that is copolymerizable with the ⁇ , ⁇ -unsaturated carboxylic acid.
  • Examples of the component that is copolymerizable with an ⁇ , ⁇ -unsaturated carboxylic acid include acrylamide, acrylonitrile, a methacrylic ester, acrylates, vinyl chloride, allyl chloride, vinyl acetate, and the like.
  • the proportion of the ⁇ , ⁇ -unsaturated carboxylic acid to the monomer constituting the polycarboxylic acid-based polymer is preferably greater than or equal to 50% by mass.
  • polycarboxylic acid-based polymers a homopolymer or copolymer of acrylic acid or itaconic acid is particularly preferable.
  • the content of a polycarboxylic acid-based polymer powder in the first component is preferably less than or equal to 20% by weight. This make the viscosity of a kneaded substance of the dental glass ionomer cement appropriate and make a kneading operation with the second component easy.
  • polycarboxylic acid-based polymer included in the second component examples include, but are not limited to, a homopolymer or copolymer of an ⁇ , ⁇ -unsaturated carboxylic acid.
  • Examples of the ⁇ , ⁇ -unsaturated carboxylic acid include acrylic acid, methacrylic acid, 2-chloroacrylic acid, 3-chloroacrylic acid, aconitic acid, mesaconic acid, maleic acid, itaconic acid, fumaric acid, glutaconic acid, citraconic acid, and the like.
  • the polycarboxylic acid-based polymer may be a copolymer of an ⁇ , ⁇ -unsaturated carboxylic acid and a component that is copolymerizable with the ⁇ , ⁇ -unsaturated carboxylic acid.
  • Examples of the component that is copolymerizable with an ⁇ , ⁇ -unsaturated carboxylic acid include acrylamide, acrylonitrile, a methacrylic ester, acrylates, vinyl chloride, allyl chloride, vinyl acetate, and the like.
  • the proportion of the ⁇ , ⁇ -unsaturated carboxylic acid to the monomer constituting the polycarboxylic acid-based polymer is preferably greater than or equal to 50% by mass.
  • polycarboxylic acid-based polymers a homopolymer or copolymer of acrylic acid or itaconic acid is particularly preferable.
  • the content of the polycarboxylic acid-based polymer in the second component is preferably in a range of from 5% to 60% by mass.
  • an operation time suitable for a clinical operation is achieved.
  • the content of the polycarboxylic acid-based polymer in the second component is less than or equal to 60% by mass, the viscosity of a kneaded substance of the dental glass ionomer cement becomes appropriate and a kneading operation with the first component becomes easy.
  • the polycarboxylic acid-based polymer in the second component may be a powder.
  • the content of water in the second component is preferably in a range of from 40% to 70% by mass.
  • the content of water in the second component is greater than or equal to 40% by mass, progress of a hardening reaction of the dental glass ionomer cement can be enhanced.
  • the content of water in the second component is less than or equal to 70% by mass, the strength of a hardened substance of the dental glass ionomer cement can be enhanced.
  • an acid for pH adjustment may be added as needed.
  • Examples of the acid for pH adjustment include phosphoric acid, citric acid, succinic acid, oxalic acid, fumaric acid, tartaric acid, malic acid, maleic acid, ethylenediaminetetraacetic acid, tricarballylic acid, levulinic acid, acidic amino acid, pyroglutamic acid, L-aspartic acid, L-arginine, citric acid, glycine, glycolic acid, DL-glyceric acid, gluconic acid, glucuronic acid, glutaric acid, acetone dicarboxylic acid, cyclopentane tetracarboxylic acid, diglycolic acid, diethyl malonic acid, L-cysteic acid, oxalic acid, sulfosalicylic acid, tartronic acid, tricarballylic acid, tetrahydrofuran tetracarboxylic acid, meso-butane-1,2,3,4-tetracarboxylic
  • the content of the acid for pH adjustment in the second component is preferably less than or equal to 20% by weight. Thereby, the strength of a hardened substance of the dental glass ionomer cement can be enhanced.
  • the mass ratio of the first component to the second component when preparing a kneaded substance of the dental glass ionomer cement is preferably between 1 and 5.
  • the mass ratio of the first component to the second component is greater than or equal to 1, the strength of a hardened substance of the dental glass ionomer cement can be enhanced.
  • the mass ratio of the first component to the second component is less than or equal to 5, the viscosity of a kneaded substance of the dental glass ionomer cement becomes appropriate and a kneading operation of the first component and the second component becomes easy.
  • отри ⁇ ески ⁇ е или отное о ⁇ ное ком ⁇ онентs such as an antibacterial agent, a fluorescent agent, a perfume, and a pigment may be added as needed to the dental glass ionomer cement according to the present embodiment.
  • an antibacterial agent such as an antibacterial agent, a fluorescent agent, a perfume, and a pigment may be added as needed to the dental glass ionomer cement according to the present embodiment.
  • a fluorescent agent such as a fluorescent agent, a perfume, and a pigment
  • a pigment such as an antibacterial agent, a fluorescent agent, a perfume, and a pigment may be added as needed to the dental glass ionomer cement according to the present embodiment.
  • a pigment such as an antibacterial agent, a fluorescent agent, a perfume, and a pigment may be added as needed to the dental glass ionomer cement according to the present embodiment.
  • the mixture was poured into water to obtain aggregated glass.
  • the obtained aggregated glass was pulverized for 20 hours and then it was caused to pass through a sieve of 120 meshes to obtain glass powder.
  • the electric furnace was heated to 1300°C, and the mixture was melted and sufficiently homogenized. Subsequently, the mixture was poured into water to obtain aggregated glass. Using a ball mill made of alumina, the obtained aggregated glass was pulverized for 20 hours and then it was caused to pass through a sieve of 120 meshes to obtain glass powder.
  • the particle size distributions of the glass powders were measured using a laser diffraction scattering type particle size distribution analyzer LA-950 (manufactured by HORIBA, Ltd.) As a result, in each of the glass powders of Examples and Comparative Examples, the number average particle diameter was in a range of from 6 ⁇ m to 9 ⁇ m.
  • Table 1 indicates the compositions of the glass powders (unit: mass%).
  • Zn, Al, Si, Ca, P, Sr, La, Na, and K are respectively the contents in terms of ZnO, Al 2 O 3 , SiO 2 , CaO, P 2 O 5 , SrO, La 2 O 3 , Na 2 O, and K 2 O.
  • the glass powder as the first component and a 50% by mass aqueous solution of polyacrylic acid as the second component were mixed such that the mass ratio of the first component to the second component was 1.8 and then kneaded to obtain a kneaded substance of the glass ionomer cement.
  • bovine dentine was polished by #1200 water-resistant abrasive paper.
  • a polytetrafluoroethylene seal having a hole of which diameter is 3 mm, was attached.
  • the kneaded substance of the glass ionomer cement was applied to half of the face of the hole, and it was left to stand in a thermostatic chamber at 37°C and 100% RH for 24 hours to harden the kneaded substance of the glass ionomer cement.
  • a demineralized liquid 50 mM of acetic acid, 1.5 mM of calcium chloride, 0.9 mM of potassium dihydrogen phosphate, pH 4.5
  • the bovine dentin, on which the hardened substance was formed was cut such that the thickness became 1 mm, and a test object was obtained.
  • the test object was photographed by a transmission method.
  • image processing software the photographed image was analyzed to find the amount of mineral loss and to evaluate the effect of suppressing tooth demineralization.
  • the criteria for determining the effects of suppressing tooth demineralization are as follows. Note that as the value of the amount of mineral loss decreases, the effect of suppressing tooth demineralization increases.
  • the effect of suppressing tooth demineralization was evaluated in a manner similar to that described above except that the kneaded substance of the dental cement was not applied at all. As a result, the amount of mineral loss was greater than or equal to 4557 vol% ⁇ m.
  • a mold (8 mm ⁇ 75 mm ⁇ 100 mm) adjusted to be at 23°C was placed on an aluminum foil, and the mold was filled with the kneaded substance of the glass ionomer cement up to the height of the upper surface of the mold.
  • the kneaded substance of the glass ionomer cement was left to stand in a constant temperature layer at 37°C and 100% RH to harden the kneaded substance of the glass ionomer cement.
  • 90 seconds after the end of kneading 400 g of a Vicat needle was lowered vertically onto the surface of the hardened substance and it was maintained for 5 seconds.
  • Table 1 indicates the evaluation results of the effects of suppressing tooth demineralization and the hardening properties of the glass ionomer cements.
  • Table 1 Comparative Example 1 2 3 4 5 6 7 8 1 2 3 4 5 6 Zn 50.5 30.0 26.4 23.8 45.0 49.5 41.7 25.2 4.6 F 3.0 5.2 6.5 6.8 3.3 3.2 4.7 5.8 13.5 13.1 12.0 11.2 9.4 13.2 Al 0.3 0.3 0.3 0.5 0.3 0.1 0.3 0.2 25.9 23.9 25.9 21.3 21.4 25.5 Si 33.0 22.9 24.7 23.1 35.5 34.8 37.7 26.8 23.8 24.0 25.1 23.6 20.9 23.3 Ca 13.2 7.1 9.6 9.3 11.4 12.1 6.6 0.3 0.1 1.8 P 4.5 1.3 4.6 3.5 3.5 1.0 4.4 Sr 12.4 35.5 34.1 31.9 28.0 47.3 21.5 La 34.5 32.5 36.5 33.2 6.0 4.6 Na 3.5 1.5 3.2 K 2.2 4.3
  • the glass ionomer cements including the glass powders of Examples 1 to 8 have a large effect of suppressing tooth demineralization.
  • the glass ionomer cements including the glass powders of Comparative Examples 1 to 6 have a low effect of suppressing tooth demineralization because the content of aluminum in the glass powders is between 21.3% and 25.9% by mass in terms of aluminum oxide (Al 2 O 3 ).

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
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  • Plastic & Reconstructive Surgery (AREA)
  • Molecular Biology (AREA)
  • Dental Preparations (AREA)

Claims (7)

  1. Dentalzement, umfassend:
    ein Glaspulver,
    wobei das Glaspulver Zink, Silicium und Fluor (F) und im Wesentlichen nicht Aluminium umfassend,
    wobei ein Anteil an Zink in dem Glaspulver, bezogen auf Zinkoxid (ZnO), in einem Bereich von 20% bis 55%, bezogen auf die Masse, ist,
    wobei ein Anteil an Silicium in dem Glaspulver, bezogen auf Siliciumoxid (SiO2), in einem Bereich von 20% bis 40%, bezogen auf die Masse, ist,
    wobei ein Anteil an Fluor (F) in dem Glaspulver in einem Bereich von 3% bis 20%, bezogen auf die Masse, ist und
    wobei ein Anteil an Aluminium in dem Glaspulver, bezogen auf Aluminiumoxid (Al2O3), weniger als oder gleich 1 Masse-% ist.
  2. Dentalzement gemäß Anspruch 1, weiter umfassend:
    Calcium,
    wobei ein Anteil an Calcium in dem Glaspulver, bezogen auf Calciumoxid (CaO), in einem Bereich von 5% bis 20%, bezogen auf die Masse, ist.
  3. Dentalzement gemäß Anspruch 1 oder 2, weiter umfassend:
    Strontium,
    wobei ein Anteil an Strontium in dem Glaspulver, bezogen auf Strontiumoxid (SrO), in einem Bereich von 10% bis 30%, bezogen auf die Masse, ist.
  4. Dentalzement gemäß einem der Ansprüche 1 bis 3, weiter umfassend:
    Phosphor,
    wobei ein Anteil an Phosphor in dem Glaspulver, bezogen auf Phosphoroxid (V) (P2O5), in einem Bereich von 0% bis 5%, bezogen auf die Masse, ist.
  5. Dentalzement gemäß einem der Ansprüche 1 bis 4, weiter umfassend:
    Lanthan,
    wobei ein Anteil an Lanthan in dem Glaspulver, bezogen auf Lanthanoxid (La2O3), in einem Bereich von 10% bis 40%, bezogen auf die Masse, ist.
  6. Dentalzement gemäß einem der Ansprüche 1 bis 5, weiter umfassend:
    Natrium,
    wobei ein Anteil an Natrium in dem Glaspulver, bezogen auf Natriumoxid (Na2O), in einem Bereich von 1% bis 10%, bezogen auf die Masse, ist.
  7. Dentalzement gemäß einem der Ansprüche 1 bis 6, weiter umfassend:
    Kalium,
    wobei ein Anteil an Kalium in dem Glaspulver, bezogen auf Kaliumoxid (K2O), in einem Bereich von 1% bis 5%, bezogen auf die Masse, ist.
EP16897053.1A 2016-03-28 2016-12-01 Zement zur dentalen verwendung Active EP3437622B1 (de)

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JP2016063857 2016-03-28
PCT/JP2016/085806 WO2017168837A1 (ja) 2016-03-28 2016-12-01 歯科用セメント

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US10646408B2 (en) * 2016-03-28 2020-05-12 Gc Corporation Dental glass powder
WO2017217122A1 (ja) * 2016-06-13 2017-12-21 株式会社ジーシー 歯科用重合性組成物
WO2018003419A1 (ja) * 2016-06-30 2018-01-04 株式会社ジーシー 歯科用処置材、及び歯科用処置材キット
JP6893148B2 (ja) * 2017-08-10 2021-06-23 株式会社ジーシー 歯科用セメント
WO2024003631A1 (en) * 2022-06-28 2024-01-04 3M Innovative Properties Company Kit of part for producing glass ionomer cement with high compressive strength

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WO1990015782A1 (en) 1987-12-17 1990-12-27 Ferro Corporation Lead-free glass
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US10646410B2 (en) 2020-05-12
EP3437622A4 (de) 2019-11-20
WO2017168837A1 (ja) 2017-10-05
EP3437622A1 (de) 2019-02-06
AU2016400777B2 (en) 2019-07-11
AU2016400777A1 (en) 2018-10-11
JP6744399B2 (ja) 2020-08-19
US20190099332A1 (en) 2019-04-04
JPWO2017168837A1 (ja) 2019-01-24

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